Dipper-tooth



F. lim/IAN.`

Patented Mar. 9,1920.

, UNITED sTATEs PATENT OFFICE.

FREDERICK EKMAN, F AJO, ARIZONA, ASSIGN OR TO TAYLOR-WHARTON IRON AND l STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

DIFFER-TOOTH.

Patented Mar. 9, 1920.

Application filed October 6, 1919. Serial No. 328,706.

To all whom, 'it may concern Be it known that I, FREDERICK EKMAN, a

` citizen of the United States, residing at Ajo,

inthe county /of Pima and State of Arizona, have Invented certain new and useful Improvements in Dipper-Teeth, of which the rlhe nature, lcharacteristic features and..

scope of the inventiongwill more readily be understood froni the following description taken in connection with the accompanying draw1ng,'f orm1ng` a part hereof, wherein- Figure l is a sectional side elevational' View, partly broken away, of a dipper tooth embodying my invention. c

Fig. 2 is a plan view thereof. Fig. 3 is a plan View of a modification. The dipper tooth may have the usual wedge'point 5, bifurcated arms or. Shanks' 6, ind web 7. On its upper and lower faces there are angular or wedgeformations 8 and 9, the nun'rberQf which may vary and which are of progressively.increasing pitch as they recede from the primaryH point. The elements'8 and 9. are formed gby' substantially V shape depressions oicorrugations 10 and 11, ranging laterally of the body, and they l "a're relatively staggered," that is to say the sublteeth or points' on one' side of the body are opposed to the corrugations on the other side. The sub-teeth may extend clear across the face Aof the tooth, as indicated at 12 in Fig. 3,01* they may stop short of the edges so as to provide marginal ribs or supports 13', asl indicated in Figs. l and 2.

From the foregoing it'will be evident that as the main wedge point 5 becomes worn iu. service, the elements 8 and 9 will afford successive and continuous cutting or excavating edges. l

The improved dipper tooth is reversible and detachable as usual and while it may be made of any specified metal I prefer to construct it of manganese steel.

Having described my invention, I claim l. A dipper tooth having sub teeth.

2. A dipper tooth having sub teeth which successively function as the main point wears away.

3. A dipper tooth having a wedge point and laterally ranging angular faces, y

4. A dipper tooth having a wedgepoint and" laterally ranging angular faces which are relatively staggered. 5'. A dipper tooth having a wedge point and laterally ranging angular faces Vformed by substantially V shape corrugations.

6. A dipper tooth including a main enjl 'cavating element having formative excavating elements developed from the body thereof and united by marginal ribs or supports. `7. A dipper tooth of manganese steel ha-ving a wedge point and wedge-like projection's formed by substantially V shape corrugations of varying pitch.

In testimony whereof I afliX my signature.

FREDERICK EKMAEI 

